Messin with my head

Dose eny one know how those, i think they are called G-Tech, car meters that measure horse power and 1/4 times work? cuz all u have to do is plug them in to the ciggeret lighter

i got one, it works pretty good. ive read other comments from people who have been to tracks with them. supposed to be very accurate.

I love mine, its great...i got the G-Force GX2 pro